Mega16 AVR controlled PLL02A SSB project

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lbcomms
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Re: Mega16 AVR controlled PLL02A SSB project

Post by lbcomms » 04 Apr 2017, 20:28

Did you get your day off and get around to making one, or are you still waiting for the parts and the programmer?

Once you've got yours made, it's "I've shown you mine, you show me yours", then we'll start in the programming.

With the soldering, it doesn't have to be that good, it's only DC. A lot of the gear we work with is digital microwave radio, 4 gigs up to about 18. No room for less than perfect soldering there, a lumpy joint becomes an extra inductor or capacitor :problem: . After working with those for the last 15 years your soldering looks pretty good...

Wombatsone
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Re: Mega16 AVR controlled PLL02A SSB project

Post by Wombatsone » 12 Feb 2018, 07:07

Hi @lbcomms, just wondering if these are suitable for this project? Or will I have to live with my embarrassing soldering skills.
Image

Cheers

lbcomms
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Re: Mega16 AVR controlled PLL02A SSB project

Post by lbcomms » 12 Feb 2018, 19:35

It'll be OK for development and testing, but too big and fragile (the wire connections) for a final fix inside a radio, especially a mobile. Lots of connections to come loose, fall off, or become noisy.

Some of those dev boards also use a regulator with 12V max input, feed them with 13.8V+ from a car alternator or a base power supply and an expensive chain reaction (i.e. radios PLL chip) awaits...

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Re: Mega16 AVR controlled PLL02A SSB project

Post by Wombatsone » 13 Feb 2018, 07:28

Awesome it will at least let me start playing, I am so far behind with this digital stuff, just playing catch up. :)

Poteroa
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Re: Mega16 AVR controlled PLL02A SSB project

Post by Poteroa » 16 Oct 2018, 16:56

Hi.

This is really interesting project!
I have an old major m120 and could be a good candidate for conversion.
Also one old 22ch am mocoma 27 is lying in the closet, ssb would make it a killer radio! Both use pll02, oldies goldies 😁

Did you ever get to the programming part lbcomms?

It should be quite easy to make the board, no problem, but with the coding part I am totally lost. Etching own circuit board is no issue, no need to order from China..

All progress stopped, as no updates for long time?

lbcomms
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Re: Mega16 AVR controlled PLL02A SSB project

Post by lbcomms » 16 Oct 2018, 19:32

Never got to finish it off due to changed circumstances at work, I was left with basically zero time to play with it.
Will be back to my old job hopefully at the end of the year, so will be able to help out then...

Poteroa
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Re: Mega16 AVR controlled PLL02A SSB project

Post by Poteroa » 17 Oct 2018, 04:06

lbcomms wrote:
16 Oct 2018, 19:32
Never got to finish it off due to changed circumstances at work, I was left with basically zero time to play with it.
Will be back to my old job hopefully at the end of the year, so will be able to help out then...
You do have some kind of "beta" version I suppose, as the one you already did? I mean to try it out.. :)

Oh, you deliberately chose the th ic-chip for easy build?
The smd one would be easier to mount in to any radio due to the size of it, but needs good skills and equipment to make it naturally..
I think I would go for the SMD type, as I do have equipment to solder it.

I have played with arduinos, but really, this seems to be more complicated coding thats needed to accomplish it.
I need to create the circuit first with circuitlab or similar and then make the pcb, of course will share it here.

Got some projects also lying around that I need to finish, but maybe can get few hours for this in near future.

What do you think lbcomms? ;)

lbcomms
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Re: Mega16 AVR controlled PLL02A SSB project

Post by lbcomms » 17 Oct 2018, 13:39

We made 3 or 4 "beta" versions, all slightly different (i.e. one of them was for the 858 PLL).

The original idea was to make it up as a kit that the locals could buy and put together themselves, SMT was deliberately avoided for that reason.
The code is easily adapted to suit different PLLs.

If you can wait until I get my old job bask, probably around the end of the year, I'll be happy to go through the coding process with you.
In the meantime, build the circuit and put it into an old / spare radio as per the diagram so you'll have something to practice on.

For commercial applications though, SMT will be used. Have a look at the Galaxy drift cure thread for some pics on our last SMT board...

Poteroa
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Re: Mega16 AVR controlled PLL02A SSB project

Post by Poteroa » 17 Oct 2018, 15:59

lbcomms wrote:
17 Oct 2018, 13:39
We made 3 or 4 "beta" versions, all slightly different (i.e. one of them was for the 858 PLL).

The original idea was to make it up as a kit that the locals could buy and put together themselves, SMT was deliberately avoided for that reason.
The code is easily adapted to suit different PLLs.

If you can wait until I get my old job bask, probably around the end of the year, I'll be happy to go through the coding process with you.
In the meantime, build the circuit and put it into an old / spare radio as per the diagram so you'll have something to practice on.

For commercial applications though, SMT will be used. Have a look at the Galaxy drift cure thread for some pics on our last SMT board...
Galaxy drift cure thread was very interesting to read and excellent success!

I will order stuff in near days, I think china is winning this order as supplier..
(wires seem to be bit crappy from there, so those need to be sourced elsewhere).

I thought to build the SMT ;) one first, then maybe the th one, parts are really so cheap. :D

You had in the schema 1n912 but I would go for the plain 1n4148 / LL4148, as they are more easily sourced in SMT.
Or did you have some specific reason for the 912´s, its just a plain 200mV zener?

Oh and the rotary switch, plain 360´deg 20 pos one? I think to go for the push button model, as then can use it for something else later on.

lbcomms
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Re: Mega16 AVR controlled PLL02A SSB project

Post by lbcomms » 17 Oct 2018, 19:26

I used the 914 diodes because that's what I had at the time, they are just used for switching (blocking any higher voltages such as the typical PTT 9 volts from killing the micro). They are NOT zeners. A zener there would pass a higher voltage and break the IC.

1n4148 will work fine. For SMT, we use BAS16 in the SOT23 package. All 3 are electrically identical in this application.

We did use an encoder with a push button in some versions, the push button connected to the HOME input. From memory, when pushed in for 2 seconds it returned the radio to a preset channel - in our case 27.355 (FCC channel 35, the Oz call channel) but easy to recode for your area / frequency.

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